<template>
  <div>
    <!-- 面包屑导航区域-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/welcome' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 添加角色 -->
    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary" @click="addRoleVisible = true">添加角色</el-button>
        </el-col>
      </el-row>
      <el-table :data="rolelist" border stripe>
        <el-table-column type="expand">
          <template slot-scope="scope">
            <!-- 展开列 -->
            <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环嵌套渲染二级权限 -->
                <el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
                  <el-col :span="6">
                    <el-tag closable @close="removeRightById(scope.row,item2.id)" type="success">{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag closable @close="removeRightById(scope.row,item3.id)" type="warning" v-for="item3 in item2.children" :key="item3.id">
                      {{item3.authName}}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <!-- <pre>{{scope.row}}</pre> -->
          </template>
        </el-table-column>
        <el-table-column type="index" label="#"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.id)">编辑</el-button>
            <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeRoleById(scope.row.id)">删除</el-button>
            <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 添加角色对话框 -->
    <el-dialog title="添加角色" :visible.sync="addRoleVisible" width="50%" @close="addRoleClosed" :close-on-click-modal="false">
      <!-- 添加用户表单区域 -->
      <el-form ref="addRoleFormRef" :model="addRoleForm" :rules="RoleFormRules" label-width="85px" class="login_form">
        <!-- 角色名称 prop-验证规则 -->
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addRoleForm.roleName"></el-input>
        </el-form-item>
        <!-- 角色描述 -->
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addRoleForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRole">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 修改角色对话框 -->
    <el-dialog title="修改角色" :visible.sync="editRoleVisible" width="50%"
      :close-on-click-modal="false">
      <!-- 修改用户表单区域 -->
      <el-form ref="editRoleFormRef" :model="editRoleForm" :rules="RoleFormRules" label-width="85px" class="login_form">
        <!-- 角色名称 -->
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editRoleForm.roleName"></el-input>
        </el-form-item>
        <!-- 角色描述 -->
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editRoleForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editRoleVisible = false">取 消</el-button>
        <el-button type="primary" @click="editUser()">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 分配权限对话框 -->
    <el-dialog title="分配角色" :visible.sync="setRightVisible" width="50%" @close="setRightClosed"
      :close-on-click-modal="false">
      <!-- 树形控件 -->
      <el-tree ref="treeRef" :data="rightslist" :props="treeProps" show-checkbox
      default-expand-all node-key="id" :default-checked-keys="defkeys"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights()">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data () {
    return {
      rolelist: [],
      addRoleVisible: false,
      editRoleVisible: false,
      setRightVisible: false,
      addRoleForm: {
        roleName: '',
        roleDesc: ''
      },
      editRoleForm: {},
      rightslist: {},
      RoleFormRules: {
        roleName: [
          {
            required: true,
            message: '请输入角色名称',
            trigger: 'blur'
          },
          {
            min: 2,
            max: 10,
            message: '角色名称的长度在 2 到10 个字符',
            trigger: 'blur'
          }
        ],
        roleDesc: [
          {
            required: true,
            message: '请输入角色描述',
            trigger: 'blur'
          },
          {
            min: 3,
            max: 10,
            message: '角色描述的长度在 3 到10 个字符',
            trigger: 'blur'
          }
        ]
      },
      // 树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选择的节点ID值数组
      defkeys: [],
      // 当前弹出角色权限分配对话框对应角色id
      roleId: ''
    }
  },
  created () {
    this.getRolesList()
  },
  methods: {
    // 获取角色列表
    async getRolesList () {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败！')
      }
      this.rolelist = res.data
    },
    // 关闭添加角色对话框
    addRoleClosed () {
      this.$refs.addRoleFormRef.resetFields()
    },
    setRightClosed () {
      this.defkeys = []
    },
    addRole () {
      this.$refs.addRoleFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post('roles', this.addRoleForm)
        if (res.meta.status !== 201) return this.$message.error('角色创建失败！')
        this.$message.success('角色创建成功')
        // 隐藏对话框
        this.addRoleVisible = false
        // 重新获取用户列表
        this.getRolesList()
      })
    },
    async showEditDialog (id) {
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('查询角色信息失败')
      }
      console.log(res.data)
      this.editRoleForm = res.data
      this.editRoleVisible = true
    },
    // 编辑角色信息
    editUser () {
      this.$refs.editRoleFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.put(
          'roles/' + this.editRoleForm.roleId,
          {
            roleName: this.editRoleForm.roleName,
            roleDesc: this.editRoleForm.roleDesc
          })
        if (res.meta.status !== 200) return this.$message.error('更新角色信息失败！')
        this.$message.success('更新角色信息成功')
        // 隐藏对话框
        this.editRoleVisible = false
        // 重新获取用户列表
        this.getRolesList()
      })
    },
    removeRoleById (id) {
      this.$confirm('此操作将永久删除该角色, 是否继续?', '提示',
        { confirmButtonText: '确定', cancelButtonText: '取消', type: 'warning' })
        .then(async () => {
          const { data: res } = await this.$http.delete('roles/' + id)
          if (res.meta.status !== 200) {
            return this.$message.error('删除角色失败！')
          }
          // this.$message({ type: 'success', message: '删除成功!' })
          this.$message.success('删除角色成功!')
          this.getRolesList()
        }).catch(() => {
          this.$message({
            type: 'info',
            message: '已取消删除'
          })
        })
    },
    // role 角色 id2-权限id
    async removeRightById (role, id2) {
      const confirmResult = await this.$confirm(
        '此操作将永久删除该权限, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定', cancelButtonText: '取消', type: 'warning'
        }
      ).catch(err => err)

      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除！')
      }
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${id2}`)
      if (res.meta.status !== 200) {
        this.$message.success('删除权限失败!')
      }
      role.children = res.data
    },
    // 展示分配权限对话框
    async showSetRightDialog (role) {
      this.roleId = role.id
      // 获取所有权限的数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('查询权限数据失败！')
      }
      this.rightslist = res.data
      this.getLeafKeys(role, this.defkeys)
      this.setRightVisible = true
    },
    // 通过递归的形式，获取角色下所有三级权限的id，保存到defkeys
    getLeafKeys (node, arr) {
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    // 为角色分配权限
    async allotRights () {
      // 以数组形式展开
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败！')
      }
      this.$message.success('权限分配成功！')
      this.getRolesList()
      this.setRightVisible = false
    }
  }

}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}

.bdtop {
  border-top: 1px solid #eee;
}

.bdbottom {
  border-bottom: 1px solid #eee;
}

.vcenter {
  display: flex;
  align-items: center;
}
</style>
